Don't create layout objects for children of display-none iframes.

third_party/WebKit/public/web/WebFrameOwnerProperties.h

Index: third_party/WebKit/public/web/WebFrameOwnerProperties.h
diff --git a/third_party/WebKit/public/web/WebFrameOwnerProperties.h b/third_party/WebKit/public/web/WebFrameOwnerProperties.h
index ec2f2a39fbde73ecfe86303fa75df5165a735a34..734c29650756cfa8a1c12efa9927dcd2689ae92f 100644
--- a/third_party/WebKit/public/web/WebFrameOwnerProperties.h
+++ b/third_party/WebKit/public/web/WebFrameOwnerProperties.h
@@ -19,6 +19,7 @@ struct WebFrameOwnerProperties {
   int marginWidth;
   int marginHeight;
   bool allowFullscreen;
+  bool isDisplayNone;
   WebString requiredCsp;
   WebVector<WebPermissionType> delegatedPermissions;
 
@@ -26,7 +27,8 @@ struct WebFrameOwnerProperties {
       : scrollingMode(ScrollingMode::Auto),
         marginWidth(-1),
         marginHeight(-1),
-        allowFullscreen(false) {}
+        allowFullscreen(false),
+        isDisplayNone(false) {}
 
 #if INSIDE_BLINK
   WebFrameOwnerProperties(
@@ -34,12 +36,14 @@ struct WebFrameOwnerProperties {
       int marginWidth,
       int marginHeight,
       bool allowFullscreen,
+      bool isDisplayNone,
       const WebString& requiredCsp,
       const WebVector<WebPermissionType>& delegatedPermissions)
       : scrollingMode(static_cast<ScrollingMode>(scrollingMode)),
         marginWidth(marginWidth),
         marginHeight(marginHeight),
         allowFullscreen(allowFullscreen),
+        isDisplayNone(isDisplayNone),
         requiredCsp(requiredCsp),
         delegatedPermissions(delegatedPermissions) {}
 #endif